I'm having a very strange issue where mining using Geth on windows is very slow using in -dev mode.
I have never had that issue before as i usually use OSX but the DAG load normally then 1 block is mined every 10+ minutes. When trying to transact with a contract it takes very long aswell. It's just basic dev mode never touched the genesis block or anything.

Anyone got any resources/clue/anything to help me fix this ?

I've reinstalled Geth , deleted all my wallet and tried with a new one, rebooted and all the like it just doesn't seem to work.